The Bega or Begej, is a 244 km long river in Romania and Serbia. It rises in the Poiana Ruscă Mountains in Romania, part of the Carpathian Mountains, and it flows into the Tisa river near Titel, Vojvodina, Serbia. Its drainage basin covers an area of 4,458 km2 (1,721 sq mi), of which 2,362 km2 (912 sq mi) in Romania.

Zrenjanin is a city and the administrative center of the Central Banat District in the autonomous province of Vojvodina, Serbia. The city urban area has a population of 67,129 inhabitants, while the city administrative area has 105,722 inhabitants. The old name for Zrenjanin is Veliki Bečkerek or Nagybecskerek as it was known under Austria-Hungary up until 1918. A thousand Catalans founded on 1735 New Barcelona in a place which is now the suburb of Dolja within Zrenjanin, exiled from the War of the Spanish Succession. After World War I and the liberation of Veliki Bečkerek the new name of the city was Petrovgrad, in honor of His Majesty King Peter I the Great Liberator, the King of Serbia and the King of Serbs, Croats and Slovenes.